fix(hyprlua): normalize hyprctl mirrorOf "none" to prevent monitor reset

hyprctl returns mirrorOf:"none" (string) for non-mirrored monitors.
Python treated it as truthy, causing apply_monitor to always emit a
mirror command, resetting resolution and scale on every keypress.
Also restores monitors.lua with correct mode/scale/transform fields.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

desktopenvs/hyprlua/hypr/usr/monitors.lua

@@ -1,7 +1,10 @@
 -- generated by monitor-manager -- do not edit by hand
 hl.monitor({
     output    = "eDP-1",
-    mirror = "none",
+    mode      = "1920x1200@60",
+    position  = "0x0",
+    scale     = 2,
+    transform = 0,
 })
 
 hl.config({

desktopenvs/hyprlua/scripts/monitor-manager

@@ -126,7 +126,7 @@ class MonitorState:
             refresh_rate=rr,
             transform=d.get("transform", 0),
             scale=d.get("scale", 1.0),
-            mirror_of=d.get("mirrorOf", ""),
+            mirror_of="" if d.get("mirrorOf", "none") in ("none", "") else d["mirrorOf"],
             available_modes=modes,
             mode_index=mode_index,
         )